15665-ZV7-030 Oil Level Pipe - Overview. The 15665-ZV7-030 Oil Level Pipe is a crucial component of Honda marine engine systems, dedicated to supporting the engine's lubrication system. Its primary function is to indicate the precise oil level within the engine's crankcase, ensuring the engine operates effectively and reliably. Designed as a genuine OEM part, it ensures seamless integration with existing parts, maintaining optimal performance and durability.. Key Features. Genuine Honda OEM Pipe